Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20359#discussion_r163750551
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/DriverRegistry.scala
---
@@ -32,6 +32,9 @@ import org.apache.spark.util.Utils
*/
object DriverRegistry extends Logging {
+ // Initialize DriverManager first to prevent potential deadlocks between
DriverManager and Driver
+ DriverManager.getDrivers
--- End diff --
if it's too hard to write a UT, I think a manual test is also fie.
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